<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>page-test</title>
</head>
<body>
    <h1> page-test <span th:text="${username}"></span> </h1>
    <span th:text="${#strings.toUpperCase(username)}"></span><br>
    <span th:text="${'preffix' + username + 'suffix'}"></span><br>
    <span th:text="|preffix ${username} suffix|"></span>

</body>
</html>